Overcoming distortion in SS 304L pressure vessel

[Shahil Saini]

Hello everyone, 

How to overcome the distortion in pressure vessel of material SS 304L?, having thickness 8mm of two dish-end and shell having thickness of 6 mm, I am attaching photographs of vessel for your reference,

[Jamie Reyes]

Heat input and weld sequence. Monitor both extensively!

On Wed, Jan 20, 2021 at 7:13 PM Shahil Saini <sainis...@gmail.com> wrote:

Hello everyone, 

How to overcome the distortion in pressure vessel of material SS 304L?, having thickness 8mm of two dish-end and shell having thickness of 6 mm, I am attaching photographs of vessel for your reference,

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Regards,

Jamie Reyes

J.R. Machine Company, Inc.

[Ajay Gupta]

Hi

You can also use water jet opposite side during welding to control distortion in SS304 L and proper stiffening due to lesser thickness.

Regards

Ajay Gupta

On Thu, Jan 21, 2021 at 8:43 AM Shahil Saini <sainis...@gmail.com> wrote:

Hello everyone, 

How to overcome the distortion in pressure vessel of material SS 304L?, having thickness 8mm of two dish-end and shell having thickness of 6 mm, I am attaching photographs of vessel for your reference,

[Shahil Saini]

Sir, in Repair job of pressure vessel how should we rectify the distortion problem? The figures are given below of the repair job of SS 304L.

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[Harshad Somani]

Use Double operator GTAW  ie two welders welding from either side simultaneously in 3G, pulling same weld puddle with Square butt joint,  5 mm gap.

Welders to practice first in 1 M long test plate. Use 2 or -2.4dia filler. 80/120 amps. 

Provide stiffnars to act gap closing . 1stStriking arc welder to add filler in joint gap second welder to operate at lower current level and add filler as and when required moving arc behind 3-4 mm from first welder. His arc also provide argon  shielding to weld  

On Thu, Jan 21, 2021, 08:43 Shahil Saini <sainis...@gmail.com> wrote:

Hello everyone, 

How to overcome the distortion in pressure vessel of material SS 304L?, having thickness 8mm of two dish-end and shell having thickness of 6 mm, I am attaching photographs of vessel for your reference,